GD131 - DC 4-20mA Output - 2 x Alarm Relay Outputs

Infrared single point gas detector. Diffusion type, Freon’s 0-2000PPM. Non-certified 3-wire,24V DC 4-20mA output. 2 x Alarm relay outputs


No separate programmer required, state of the art technology. Very robust for industrial use, no moving parts, heaters or mirrors that are often the cause of failures.

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The GD131 Sensor is used for diffusion sensing applications. These are applications in which the sensor continuously monitors that part of the environment with which it is in contact, and the gas diffuses through the sensor’s optical path. The sensor is used to detect the presence of Refrigerant gases (R22, R134a, and similar gases). In a typical application, the sensor unit is electrically connected to a system capable of either providing readouts indicating the concentration of the gas detected by the sensor or generating alarms from volt free alarm contacts changing over when a pre-set concentration of the refrigerant gas is detected.


  • Weight: 1.25kg
  • Height: 90mm
  • Width: 180mm
  • Length: 275mm

Additional Info

Power Requirements

  • Input Voltage: 24V DC
  • Power Consumption: 250mA
  • Max Switching Current: 2A
  • Power Input: 4-20mA

Time Info

  • Life Expectancy: 5 years
  • Warranty: 12 Months
  • Rating: IP55
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